Sideview Plus is a Firefox extension designed for users who need to multitask effectively without the need for a second monitor. This tool allows users to split their browser windows seamlessly into two separate views, facilitating a more organized browsing experience. With just two clicks or a keyboard shortcut, users can merge the windows back together, making it easy to manage multiple tasks simultaneously. Additionally, the main window automatically maximizes when the side window is closed, optimizing screen space usage.

This extension also includes features such as quick web searches within the tab, and a mobile mode that activates in narrower windows to prevent horizontal scrolling. The controls are designed to be simple and intuitive, although they may be disabled on select responsive webpages by default. Users have the option to configure settings based on width thresholds, domains, subdomains, and specific pages, allowing for a tailored browsing experience.